Give whatever you are doing and whoever you are with the gift of your attention.
The two great words of antiquity are behold and beware. Behold the possibilities and beware the temptations.
There are two key lessons: a) The only way to survive in business is to be profitable, unless you have an unlimited amount of money; b) Get through your difficulty and learn to do better next time.
Take advice, but not orders. Only give yourself orders.
Formal education will make you a living; self-education will make you a fortune.
The least lack of discipline starts to erode our self-esteem.